Sex at 15

I'm 15 turning 16 and I want to start having sex. I feel like a loser because everyone I know is giving it up and I don't want to be a virgin anymore. But the whole getting prego thing is scaring me I don't want to get prego. I want to get on birth control but I don't know if I have to have a parents concent just to get it. Do I? I don't now how to tell my parents that I want to have sex. Please help